The correct option is D Affinity
'Attachment' means to be connected or bonded to something. Similarly, the word 'affinity' means to be attracted to or drawn towards something. Hence, option A is the right answer. 'Influence' means 'to have an effect on the action, opinion, or behavior of something', 'causation' means 'the action of producing or resulting in something', and 'appendage' means 'a smaller part of something else'. Therefore, options B, C, and D are incorrect.